Still repeat some of my suggestions that I think are worth to go for, not ?
But first : manual battles and show the defending army please ! Now it's going "blind" ... I ones tried to defeat the most low era opponent (I had no other choice!) and ... I won ! Why ? Just because that player had only 1 unit in defense ! IF we can SEE the defending armies, we can AT LEAST see which one only selected 1 or a few units and not 8 ! I've lost so far 24 units and I won 2 (since PvP Arena can be "tested"), woow, impressive !!
Manual battles, for my part WITHOUT rogues (I don't care, I can use enough rogues in GE, GBG or GvG!) and without any boost for attack or defense.
I'm not afraid to try a fight against a player that is 1 or 2 Era's above me, especially not if they only have 1 a 4 units in defense !
And secondly : please please please ... make this a FAIR TO PLAY feature for EVERY AGE ! I'm in PE already, but I can imagine being only in EMA (without an Alcatraz and maybe having just a few rogues ... this feature is simply a KILLER and I will immediately loose all Hope and will completely ignore (and forget!!) this "feature" (can't call it by it's current name anymore !)
I repeat and I don't stop repeating it, here back some INSPIRATION for Inno ...
1)
Create a 4th "slot", an empty one : here each player can select other players they wish to battle against (from neighborhood or whatever).
If possible (yes, many here would be pleased !), let players send a request to other players (like sending a friendship request, but now you name it : battle request or challenge request or ... ) ... that other player, if online, can accept such request and BOTH can start doing a battle, both manual, so that would be
REAL P vs P !! Up with it, it had already be THIS WAY from the beginning !
OR (more work ? ) :
2) Create a brand new 5 units team of all ages (without the use of rogues), so everyone fight with the same kind of units and, again, avoid any bonus for attack or defense from players ...
Give those 5 different units Unique skills !
As special unique rewards you can win fragments of an Emmisary and when you gathered a complete set you can sellect this Emmisary for you Town Hall to get each day 1 very special Unit ! (or bonus or special ability or ... read further on about it!)
Or bring up more than 1 kind of Emmisary to collect (with fragments), like one that give a speical Bonus for one of your units or one that give the Special ability to Change some of the Tiles on the Battleground, right before the battle starts .... or one that ... etc ... (be creative, think about this idea, please!)
Be creative, think creative, please Inno, think beyond the walls of your imagination !! Give every player (on the PvP Arena army managment, apart from other players army window !) 8 units of each 5 kind of units. These units, even killed, restore after the battle is done, ONLY those "special units" you can get from that Emmisary , if killed, are lost forever . That way those fragments of a possible PvP Arena Emmisary become even more valuable and more players will try to get them !